Finding correct ecm

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Oct 21, 2024 | 09:21 PM

Fordlife300

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1st Gear

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Finding correct ecm

I have a 91 f150 4.9l 4x4, manual Mazda 5 speed transmission. Also has a/c not sure if that matters. The current computer in the truck is aftermarket and does not have any markings.Im looking for a replacement computer. I have the calibration number just not sure what to do after that.

Oct 31, 2024 | 05:36 PM

JJF20

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Joined: Nov 2017

Posts: 17,496

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From: Northern Ontario

Bump.. to help the OP.

You can go through this thread, or post up in there your question if no answer here. It may get noticed better there.

https://www.ford-trucks.com/forums/1...ber-dummy.html

Oct 31, 2024 | 07:45 PM

97SuperDuty

Tuned

Joined: Aug 2010

Posts: 275

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Don't discount Facebook Marketplace, I see tons of f-series units on there. Some vendors have a slew of them, for various engines and years.

Oct 31, 2024 | 07:50 PM

JJF20

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Joined: Nov 2017

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From: Northern Ontario

He needs to sort out which one he needs first… Hopefully someone will chime in with it.

OP, have you considered sending out what you have now for repair to get going again, and once you figure which one you need, put a spare on the shelf?

Nov 1, 2024 | 08:55 AM

rla2005

Fleet Owner

Joined: Oct 2005

Posts: 20,789

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From: Kentucky

Perhaps @subford can help.

That calibration code does not come up with tangible results when I searched the interwebs.

Nov 1, 2024 | 11:09 AM

wwhite

Logistics Pro

Joined: Aug 2014

Posts: 3,566

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Is your truck Mass Air Flow(MAF) or Speed Density(SD) ?

Can you post a picture of your EEC, and the inside if possible?

Nov 1, 2024 | 03:14 PM

subford

Fleet Owner

Joined: Aug 2005

Posts: 23,667

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From: Easton,Ks

For 1-51H-R0 the number on the unit should be F1TF-12A650-ADA.
And the Ford part number of F1TZ-12A650-ADA or F2TZ-12A650-ASB.

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Nov 1, 2024 | 03:36 PM

rla2005

Fleet Owner

Joined: Oct 2005

Posts: 20,789

Likes: 1,753

From: Kentucky

Thanks @subford !

Nov 1, 2024 | 03:44 PM

#10

subford

Fleet Owner

Joined: Aug 2005

Posts: 23,667

Likes: 301

From: Easton,Ks

For calibration code# 1-64H-ROO the number on the unit would be F1TF-12A650-AUA.
And the Ford part number is F1TZ-12A650-AUA.

Nov 1, 2024 | 03:59 PM

#11

Jamesw1725

3rd Gear

Joined: Nov 2024

Posts: 3

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Thank you Sir! You are the man.

Nov 2, 2024 | 08:58 PM

#12

Jamesw1725

3rd Gear

Joined: Nov 2024

Posts: 3

Likes: 0

Thanks subford

Update! Had to drive 4 hours to find the right eec, but well worth it! Od light started flashing (instead of staying on solid),pulled codes 66,91,93,94,and 99. Brain kicked in so I switched the tranny plug around and bam! All is good in my world again (for now anyway).
Thanks again Subford for everything you contribute to this site, I can't thank you enough!